Here’s where classy really shines. This 4mm, beautiful piece from our White Tungsten Wedding Bands collection is made of jewelry-grade tungsten carbide, with a nickel binder and no cobalt. We embed rhodium, a platinum-group metal, into the tungsten, so that couples can enjoy the durability of tungsten in a white-gold color. Its traditional flat design and brushed-finish stripe is accented by mirror-like edges. It’s great as either a promise ring or as a wedding band. It also comes in 6 mm or 8 mm, so couples can easily have a matched set. Our guarantee is very classy as well. We include with each ring a free lifetime warranty and free lifetime sizing.